Anionic surfactant and use thereof

Abstract

A compound of formula (I): R 1 O—(CH 2 CH 2 O) x —(CH 2 CH(R 2 )—O) y —SO 3 M, wherein R 1 , R 2 , x, y and M are defined herein. A composition comprising the compound of formula (I) and the use thereof.

1 - 15 : (canceled) 
     
     
         16 . A compound of formula (I):
   R 1 O—(CH 2 CH 2 O) x —(CH 2 CH(R 2 )—O) y —SO 3 M  (I)
   wherein R 1  is a linear or branched, saturated or unsaturated, C 4 -C 18  hydrocarbon group;   R 2  is CH 3  or CH 2 CH 3 ;   x is a real number in the range of from 1 to 11;   y is a real number in the range of from 1 to 20; and   M is a cation.   
     
     
         17 . The compound according to  claim 16 , wherein R 1  is a linear or branched C 4 -C 18  alkyl group. 
     
     
         18 . The compound according to  claim 16 , wherein R 1  is a linear or branched C 12 -C 18  alkyl group. 
     
     
         19 . The compound according to  claim 16 , wherein x is a real number in the range of from 3 to 8. 
     
     
         20 . The compound according to  claim 16 , wherein y is a real number in the range of from 3 to 8. 
     
     
         21 . The compound according to  claim 16 , wherein M is selected from the group consisting of Na + , K + , Li +  and —(HNR 3 R 4 R 5 ) +  wherein R 3 , R 4  and R 5  are independently H, a C 1 -C 6  alkyl or C 1 -C 6  hydroxylalkyl group. 
     
     
         22 . A composition comprising the compound according to  claim 16 . 
     
     
         23 . The composition according to  claim 22 , wherein the composition further comprises a compound of formula (II):
   R 1 O—(CH 2 CH 2 O) x —(CH 2 CH(R 2 )—O) y —H  (II)
   wherein R 1  is a linear or branched, saturated or unsaturated, C 4 -C 18  hydrocarbon group;   R 2  is CH 3  or CH 2 CH 3 ;   x is a real number in the range of from 1 to 11;   y is a real number in the range of from 1 to 20.   
     
     
         24 . The composition according to  claim 23 , wherein the weight ratio of said compound of formula (I) to said compound of formula (II) is in the range of from 90:10 to 70:30. 
     
     
         25 . The composition according to  claim 22 , wherein the composition further comprises a co-surfactant. 
     
     
         26 . The composition according to  claim 25 , wherein the co-surfactant is an ethoxylated alcohol or a salt thereof. 
     
     
         27 . The composition according to  claim 22 , wherein the composition further comprises water. 
     
     
         28 . The composition according to  claim 22 , wherein said compound of formula (I) is present in an amount of from 30 wt % to 60 wt % based on the total weight of the composition. 
     
     
         29 . A method for the emulsion polymerization of at least one ethylentically unsaturated monomer comprising at least one carbon-to-carbon double bond, said method comprising polymerizing said ethylentically unsaturated monomer in an aqueous medium in the presence of the compound according to  claim 16 , and a water-soluble initiator. 
     
     
         30 . A method for the emulsion polymerization of at least one ethylentically unsaturated monomer comprising at least one carbon-to-carbon double bond, said method comprising polymerizing said ethylentically unsaturated monomer in an aqueous medium in the presence of the composition according to  claim 22 , and a water-soluble initiator.